Open-File Report 2005-1413
The projection used to project the latitude and longitude coordinates is that used for the Decade of North American Geology (DNAG) maps. The projection type is Spherical Transverse Mercator with a base latitude of zero degrees and a reference longitude of 100 degrees W. The scale factor used is 0.926 with no false easting or northing. The longitude-latitude datum is NAD27 and the units of the xy-coordinates are in meters. The ellipsoid used is Clarke 1866.
Home | Data Files | Data Processing | Flightline Databases | Maps | References | Glossary
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://pubsdata.usgs.gov/pubs/of/2005/1413/projection.htm
Page Contact Information: USGS Publications Team
Page Last Modified: Saturday, 12-Jan-2013 21:49:03 EST
